CA1096965A - Editing system - Google Patents
Editing systemInfo
- Publication number
- CA1096965A CA1096965A CA283,773A CA283773A CA1096965A CA 1096965 A CA1096965 A CA 1096965A CA 283773 A CA283773 A CA 283773A CA 1096965 A CA1096965 A CA 1096965A
- Authority
- CA
- Canada
- Prior art keywords
- signal
- time code
- recorded
- video
- tape
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
- G11B27/19—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier
- G11B27/28—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording
- G11B27/32—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on separate auxiliary tracks of the same or an auxiliary record carrier
- G11B27/322—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on separate auxiliary tracks of the same or an auxiliary record carrier used signal is digitally coded
- G11B27/323—Time code signal, e.g. on a cue track as SMPTE- or EBU-time code
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
- G11B15/005—Programmed access in sequence to indexed parts of tracks of operating tapes, by driving or guiding the tape
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/02—Editing, e.g. varying the order of information signals recorded on, or reproduced from, record carriers
- G11B27/022—Electronic editing of analogue information signals, e.g. audio or video signals
- G11B27/024—Electronic editing of analogue information signals, e.g. audio or video signals on tapes
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/02—Editing, e.g. varying the order of information signals recorded on, or reproduced from, record carriers
- G11B27/022—Electronic editing of analogue information signals, e.g. audio or video signals
- G11B27/029—Insert-editing
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
- G11B27/19—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier
- G11B27/28—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording
- G11B27/30—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on the same track as the main recording
- G11B27/3027—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on the same track as the main recording used signal is digitally coded
- G11B27/3036—Time code signal
- G11B27/3054—Vertical Interval Time code [VITC]
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B2220/00—Record carriers by type
- G11B2220/90—Tape-like record carriers
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Indexing, Searching, Synchronizing, And The Amount Of Synchronization Travel Of Record Carriers (AREA)
- Management Or Editing Of Information On Record Carriers (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
An editing system having a circuit for inserting an address signal in a vertical blanking period of a video signal, a generator for the SMPTE time code, a reader for reading the address signal in a vertical blanking period of a video signal, a reader for reading the SMPTE time code, and a preset circuit for presetting the SMPTE time code generator according to an output of the SMPTE time code reader.
An editing system having a circuit for inserting an address signal in a vertical blanking period of a video signal, a generator for the SMPTE time code, a reader for reading the address signal in a vertical blanking period of a video signal, a reader for reading the SMPTE time code, and a preset circuit for presetting the SMPTE time code generator according to an output of the SMPTE time code reader.
Description
- - - - --~
BACKGROUND OF THE INVENTION
Field of the Invention This invention relates generally to an editing system, and is directed more particularly to a system which provides an address signal used for recording a video signal into the vertical - blanking period of which the address signal is inserted.
Description of the Prior Art .
In order to achieve an edition of a video and/or audio signal speedily and precisely, in the art there is proposed a method of recording an address-slgnal on a magnetic tape in addition to a video and/or audio signal. In this case, as the address signal there are present signals of various codes, but the SMPTE time code signal is recommended as an American National Standard and the EBU time code signal is recommended as a standard code for 625 - line / 50 - field television tape-recordings. In the art, the above two time code signals are coded on a record medium along its longitudinal tracks and the read~ut of the signals can be achieved at tape speeds from slow to high speed. In the case where the record medium is stopped or transported at a very low speed, the reproduction '.
. ,., , : : . . . : , 6~5 of time code signals becomes impossible. In ~act, upon editing a video tape by a video tape recorder its merit is that an editor can choose indi~idual frames presented visually at very low tape speeds, but there occurs such a demerit in this case that the address of a chosen ~rame can not be known.
The time code signals identi~y each television frame, but the identification o~ its even or odd field and that of ~- the phase of the burst signal o~ each television field are impossible. Therefore, no precise editing can be achieved by the a~ove prior art.
In order to remove the above defects, the inventor of this invention has pxoposed such a method to insert an address signal, which will be referred to as a VITC (vertical interval time code~ signal, in a vertical blanking period of a video signal in the copend~ng applicatlon Ser-ial Noi 283j774, filed on July 26, 1977. ~f both the VITC signal and longi-tudinal track time code signal such as the well-known SMPTE
time code recorded on a long~tudinal track of a magnetic tape are used, the address of a video stgnal can be always known irre~àrdlèss of transpo~tàtion speeds o~the~tape.
However, it ~s necessary that when insert editing or assemble editing is carried out, the VITC and longitudinal track time code of video signals which are newly recorded should be made such codes continuous to those of video signals which were recorded previously.
An object of this invention is to provide an editing system which is useful for editing a magnetic tape on which video signals inserted with the VITC signal are recorded and ; 30 for recording new video signals.
3 _ ~6~
Another ob~ect of the i.n~ention is to provide an editing system which can ~e used not only in editing but also recording a signal including an address signal.
To this end, according to an editing system of the present invention, there is provided a VITC signal inserting circuit which is controlled upon eaiting in accordance with the VITC signal and/or longitudinal track time code signal obtained from a VTR (video tape recorder~ or slave VTR by which a new recording is carried out so as to make the V~TC of a newly recorded siynal continuous to the time code of a previously recorded signal.
More specifically, in accordance with the invention, there is provided an editing system comprising: means for inserting a first address signal in the frames of a vertical blanking period of a v~deo signal recorded on a video track of a tape; means for generating a second address signal recorded on a lonyitudinal track o~ said tape; a ~irst reading circuit for reading sa~d first address signal reproduced from said video track; a second reading circuit for reading said second address signal reproduced from said longitudinal track; means for selecting one address from either of said first address signal inserting means or said second address signal generating means in response to one of the outputs from said first and second reading circuits; further comprising first means fox supplying an output from said first reading circuit to said first address signal inserting means, further comprising second means for supplying an output from said second reading circuit to said second address signal generating means, wherein said first and second supply means for selecting include first and second switches, and further comprising means for controlling said second address signal generating .
,~ .
6~
means ~y said first address signal inserting means.
The other o~jects, features and advantages of the invention will become apparent ~rom the following description taken in con~unction with the accompanying drawings.
BR~EF DES RTPT~ON OF THE DRAWINGS
Fig. 1 is a top plan view of a part o~ a magnetic tape on which a video signal is recorded as slant tracks and an address signal is also recorded by a prior art method;
Fig. 2 is a schematic diagram illustrating the SMPTE
time code signal recorded on t~e tape;
Fig. 3 is a top plan ~iew of a part of a magnetic tape on which a video signal and address signal are recorded by the method of the invention;
Fig. 4 is a diagram showing a recorded pattern of signals on a tape which is recorded ~y the invention;
Fig. 5 is a diagram showing a part o a magnetic tape used for the explanat~on o~ tape edition;
Fig. 6 ~s a diagram showing a part of a magnetic tape used for the explanation of tape edition;
~ ~a ~
~6965 Fig.7 is a block c1iagram showing an example of editing systems aecording to the invention; ancl Figs,8A to 8D are wavef'orm diagrams used for explaining the operation of the system shown in- Fig.7, DESC~IPI'ION, OF TIIE PREFERRED EMBODIMEN'rS
Before deseribing the present invention, a prior art methocl oï recording an address signal on a magnetie tape will be now deseribecl with referenee to Fig.1 whieh shows a part of a magnetic tape on whieh an address signal is reeorded in addition to a video signal.
In Fig.1 ~ TV represents slant video t:raeks formed on a magnetic tape T each of which ineludes a video signal of one field, and TA ~ TQ and TC designate tracks on tape T which include an audio, cue and eontrol signals, respectively. On eue track TQ there is recorded an address signal. In this case, an SMPTE time code signal is used as the address signal and two video tracks TV which form one frame are identified by one SMPTE
time code signal.
The SMPTE time code is approved as the Ameriean National Standard time and control code for video and audio tape for 525 line / 60 field television systems on April 2, 1975 and published on the J'ournal of the SMPTE, Volume 84, July 1975, As shown in Fig.2 which schematically illustrates the SMPTE code signal, each address eorresponding to one frame eonsists of 80 bits numbered 0 through 79 and the bit frequeney is seleeted as 2.4 KHz . In the ease of Fig.2, time address bits eonsisting of 26 bits show 29 frames, 59 seeonds, 59 minutes, and 23 hours. The bit number 10 is the drop frame falg ~ the bit numbers 11, 27, 43, 58 and 59 are unassigned address bits, and the bit numbers 4 to 7, 12 to 15, 20 to 23, 28 to 31, 36 to 39, 44 to 47, 52 to 55 and 60 to 63 are user bitsf respectively.
The synchronizing word of 16 bits is so arranged that it is discriminated whether the tape is transported in the forward direction and hence the SMPTE time code signal is read out in the direction indicated by an arrow F or the tape is transported in the backward direction and hence the SMPTE time code signal is read out in the direction indicated by an arrow R. Accord~
ingly, the time code signal can be read out correctly even if the tape is transported in any direction. In this case, the code signal is so recorded that the information "1" and "0"
thereof are recorded as a so-called bi-phase mark, as shown in Fig. 2.
As described above, if the address signal for each frame of the video signal is recorded on the track TQ which ex-tend in the lengthwise direction of tape T, the tape edition can be carried out very rapidly and precisely.
However, in the case of a slow or still motion repro-duction mode, the speed of the tape becomes very slow or the tape is stopped so that the code signal recorded on the track TQ can not be read out.
Hereinafter, with reference to Figs. 3 and 4 an example of the invention proposed in the aforesaid by copending applica-tion will be described by which an address signal can be read out even in a slow or still reproduction mode and hence the edition of a tape can be carried out efficiently and in which the video signal of the NTSC system is shown as an example.
In Fig. 3 which is a top plan view of a part of a mag-netic tape T on which the video signal and address signals are recorded by the method of the invention.
.,~
With the invention~ an address signal SA identifying a video signal corresponding to eaclI traclc TV is inserted in the video signal as a digital signal antl the video signals, each including the address signal SA, are recorded on thetape 1 as slant traclcs Tv. The address signals SA recorded on the video traclcs TV are marked with single hatches in Eilig.3. In this case, the address signals SA are inserted into the video signals Or odd and even fields of one frame and then recorded as shown in Fig.3.
As shown with single hatches in Fig.4 which shows a record pattern of signals on the tape (not shown) by the invention, one address signal is inserted into one horizontal line period in the suppressed line period within the vertical blanking period or ver-tical interval except a vertical synchronizing pulse period Tvp and equalizing pulse period TEp . In this case, the address - signal is inserted in the period after burst signals Sg and it is desired that the same address signals are inserted repeatedly into three successive horizontal line periods. Hereinafter, this address signal will be referred to simply as a VITC (vertical interval time code) signal. The above suppressed periods mean 10th to 21 st line periods in the NTSC system.
The code oï the VITC signal consists of, for example, 80 bits similar to the SMPTE time code signal shown in Fig.2 andits bit frequency fB is selected as the color subcarrier frequency fSC
( _ 3. 58 MHz ) divided by an integer, for example, one half (1/2) of frequency fsc If the horizontal line frequencv is taken as fH
and the vertical frequency as fV ~ respectively, the following rela-tion (1 ) is established:
fsc 2 H 4 fv ....................... (1 ) ' ' ',, ' ' ' . .
9~
Thus, if the following relation (2) is established:
fB = 2 fSC ,,.,,, (2) the following equation (3) is presented:
B ~ fH ,...,, (3) Thus. 80 bits of the VITC signal can be inserted into one horizontal line period, In 80 bits, 32 bits are adclress bits, other 32 bits are user bits and remaining 16 bits are sync (synchronizing) words, respectively, The arranging relation between-the address bits and user bits could be same as that of the SMPTE time code signal shown in Fig.2, and the adclress bits inserted in ocld and even fields of the same frame are selected same in code, The sync words are located at the head of the VITC signal or immediately after the burst signal SB . As set forth above. the sync words having the same code as that of the SMPTE time code signal shown in Fig.2 could be sufficient, but they are recorded on the video track and hence the reading direction of the code signa] is constant irrespec-tive of the tape transporting direction, Therefore~ they could have entirely different type of the code, By way of egample, they could be changed to the start codes of the VITC signal and the field identi-fication code to identify the odd field ancl the even field, Further, the field identification can be achieved by making the bit number 11 to be "0" or "1 ", Though the SMPTE time code signal and VITC signal are recorded on different tracks . their contents or addresses must be same with each other, In the art there has been known as an edit mode such a case that, as shown in Fig.5 which shows a part of a magnetic tape T having recorded thereon video signals as slant tracks TV ~ parts of recorded tracks TV shown by dotted lines in : .
6~
Fig.5 are erased and then other video signals are recorded on the erased part of tape T, namely, an insert editing is carried out, or such a case that, as shown in Fig.6 which shows a part o~` a magnetic tape r on which video signals are already recorded as slant tracks TV ~ there are newly recorded other video signals following the previous recorded tracks as shown by dotted lines in Fig.6, namely, an assembly editing is carried out. In E'igs 5 and 6, traclss TA ~ TQ and TC are omitted for the salse oî brevity In such a case that video signals, which are inserted and then recorded on a tape or recorded additionally on the tape, are inserted with the VITC signal SA, if the video signals are recorded on the tape as they are, the VITC signals or addresses in recorded tracks TV of video signals have no continuity and hence do not correspond to the SMPTE time code signals and/or VITC signal of the video sig-nals recorded already. Accordingly, in such a case it is necessary -- that the VITC signal SA in the video signal, which is to be inserted or added and then recorded, is removed and thereafter a signal, which has the continuity to the VITC signal SA of the track TV recorded already and corresponds to the SMPTE time code recorded on track TQ, is inserted and then recorded.
The present invention is to provide an editing system which can carry out an editing including the address signal.
An example of editing systems according to the invention will be now described with reference to Fig.7.
In Fig.7, 1 designates a VTR ( video tape recorder ) .
This VTR 1 records a video signal supplied thereto through an input terminal 2V on a tape ( not shown ) as a slant track TV and records the SMPTE time code signal applied thereto through an input terminal 2S on the tape as the track TQ extending in the longitudinal direction oï the tape in recording mode, while reproduces the video signal from s the track TV~ then delivers the same to an output terminal 3V
and reproduces the SMPTE time code signal from track TQ, then delivers the same to an output terminal 3S in reproducing mode.
In Fig. 7, 4 designates a VITC signal inserting cir-cuit which produces the above VITC signal SA and then inserts the same into the video signal, and 5 an SMPTE time code signal generator. The VITC signal inserting circuit 4 can use various circuits shown in, for example, my above-mentioned copending application.
The editing system shown in Fig. 7 has further provid-ed with a VITC reader 6 for reading the VITC signal SA from the video signal, into which the VITC signal SA is inserted, and an SMPTE code reader 7 for reading the SMPTE time code signal.
A video signal which is to be newly inserted and then recorded, is applied to VITC signal inserting circuit 4 through an input terminal 8, and its synchronizing signal is applied to SMPTE time code generator 5 through an input terminal 9, respec-tively. The synchronizing signal applied to input terminal 9 is fed to SMPTE time code signal generator 5, which thèn produces a frame pulse from the synchronizing signal and SMPTE time code signal. However, if the SMPTE time code signal is recorded in the track TQ on the tape of VTR 1, this SMPTE time code signal is reproduced, then supplied through a switch 16 to SMPTE code reader 7 and read out thereby. The output signal from SMPTE code reader 7 is fed through a switch 14 to SMPTE time code signal generator 5 as a preset signal so as to make the SMPTE time code signal therefrom correspond to the SMPTE time code signal recorded on the tape. The SMPTE time code signa:L thus obtained rom SMPTE
time code signal generator 5 is fed through a switch 12 to VITC
signal inserting circuit 4. When there is the VITC signal in a video signal to be newly inserted and recorded, this VITC signal is removed, and in place thereof such a , ~69~iS
VITC signal SA whic}l is provided by time charg~ng the SMPTE
time code signal from SMPTE time code generator 5 is inserted into the vicleo signal, The video signal into which the new VITC signal SA is inserted is supplied from VITC signal insert-ing circuit ~ through input terminal 2V to VTR 1 which inserts or additionally records the video signal on the tape such as shown in Fig,5 or 6.
In the exarnple of the invention shown in Fig,7, SMPTE time code signal generator 5 produces a synchronizing word pulse in the interval of a synchronizing word after a frame as shown in Fig.8A and forms a time code at the initial position of the synchronizing word pulse as shown in Fig,8A. Since it requires the time of one frame to read out the SMPI`E time code, SMPTE code reader 7 carries out its reading delayed by one frame as shown in Fig,8C, Accordingly, SMPTE time code signal generator 5 is preset so as to add one address to the read out out-put, By such signal processing, the VITC signals SA
become continuous through tracks TV which are already formed on the tape and tracks TV which are newly formed on the tape, The video signal delivered to output terminal 3V from VTR -I is l'ed through a switch 15 to VITC reader 6 which then reads out the VITC signal in the video signal which is already recorded, and a signal which is provided by adding one address to the read out VITC signal is fed to VITC signal inserting circuit 4 as its preset signal, Thus, it becomes possible that the VITC
signal in the video signal which will be newly recorded has con-tinuity to the VITC signal in the video signal which is already recorded, This latter method is preferred for use with such a VTR which can not record the SMPTE time code signal, .. : : - . , .
~6~
In Fig,7, l0 clesignates an input termina1 for an external VITC signal and 11 designates an input terminal ror an external SMPTE time code signal. It is possible that the e c-ternal VITC signal o:r SMPTE time code signal led to input terminal 10 or 11 is fed through switch l 5 or 16 to VITC reader - 6 or SMPTE t;me code,reader 7 to produce the preset signal for VITC signal inserting circuit 4 or SMPTE signal generator 5.
Thus, the function of VTR can be improved even though this has no direct relation to editing.
In the system of the invention shown in E~'ig.7, the signal transmission between VITC reader 6 and SMPTE -time code reader 7 can be carried out to preset. each other. Therefore.
it is possible that even when only one of traclcs TQ and TV includes the code signal (SMPTE time code signal or VITC signal) . both readers 6 and 7 can produce the preset signals. In this case, it - may be possible that a circuit is provided for comparing the outputsignals from both readers 6 and 7 to detec-t whether there is an error read out of the address signal caused by dropouts or not and to change the output from an error reader to that fram a correct reader.
~hen a switch 13 is made ON, the signal from VITC
signal inserting circuit 4 is supplied to SMPTE time code signal generator 5. Thus, it is possible that the SMPTE time code signal is produced from the VITC signal which is to be inserted into the video signal and recorded on track TQ .
As described above. since with the present invention the VITC signal in the video signal to be recorded is removed and the VITC signal in the video signal which is already recorded or VITC signal preset by the VITC signal from the track extended in the longitudinal direction of the tape is inserted into the video signal :: , , :
which is newly recorcled, upon editing the acldresses in the video tracks can be made continuous.
Further, with the editing system of the invention, when the signal is transmitted to a remote place, it is of no need to transmit the SMPTE time code signal through a line separate - from that og the videc~ signal and both the code signals can be recorded in the record tracks.
In the system Or the invention shown in Fig.7, when the video signal rrom a VTR, in which no SMPTE tirne code signal is recorded but only the VITC signal is recorcled, is dubbed on VTR 1, it is better that the VITC signal grom VITC signal insert~
ing circuit '~ is supplied through switch 13 to SMPTE time code generator 5 to preset the SMPTE time code thereog to that carre-sponding to the VITC. Thus, -the SMPTE time code can be also recorded on VTR 1 .
- The above description is given on a single pregerred embodiment of the present invention, but it will be apparent that many modigications and variations could be efgected by one skilled in the art without departing grom the spirits or scope of the novel concepts of the invention. Thererore, the scope og the invention should be determined by the appended claims only.
I ~
BACKGROUND OF THE INVENTION
Field of the Invention This invention relates generally to an editing system, and is directed more particularly to a system which provides an address signal used for recording a video signal into the vertical - blanking period of which the address signal is inserted.
Description of the Prior Art .
In order to achieve an edition of a video and/or audio signal speedily and precisely, in the art there is proposed a method of recording an address-slgnal on a magnetic tape in addition to a video and/or audio signal. In this case, as the address signal there are present signals of various codes, but the SMPTE time code signal is recommended as an American National Standard and the EBU time code signal is recommended as a standard code for 625 - line / 50 - field television tape-recordings. In the art, the above two time code signals are coded on a record medium along its longitudinal tracks and the read~ut of the signals can be achieved at tape speeds from slow to high speed. In the case where the record medium is stopped or transported at a very low speed, the reproduction '.
. ,., , : : . . . : , 6~5 of time code signals becomes impossible. In ~act, upon editing a video tape by a video tape recorder its merit is that an editor can choose indi~idual frames presented visually at very low tape speeds, but there occurs such a demerit in this case that the address of a chosen ~rame can not be known.
The time code signals identi~y each television frame, but the identification o~ its even or odd field and that of ~- the phase of the burst signal o~ each television field are impossible. Therefore, no precise editing can be achieved by the a~ove prior art.
In order to remove the above defects, the inventor of this invention has pxoposed such a method to insert an address signal, which will be referred to as a VITC (vertical interval time code~ signal, in a vertical blanking period of a video signal in the copend~ng applicatlon Ser-ial Noi 283j774, filed on July 26, 1977. ~f both the VITC signal and longi-tudinal track time code signal such as the well-known SMPTE
time code recorded on a long~tudinal track of a magnetic tape are used, the address of a video stgnal can be always known irre~àrdlèss of transpo~tàtion speeds o~the~tape.
However, it ~s necessary that when insert editing or assemble editing is carried out, the VITC and longitudinal track time code of video signals which are newly recorded should be made such codes continuous to those of video signals which were recorded previously.
An object of this invention is to provide an editing system which is useful for editing a magnetic tape on which video signals inserted with the VITC signal are recorded and ; 30 for recording new video signals.
3 _ ~6~
Another ob~ect of the i.n~ention is to provide an editing system which can ~e used not only in editing but also recording a signal including an address signal.
To this end, according to an editing system of the present invention, there is provided a VITC signal inserting circuit which is controlled upon eaiting in accordance with the VITC signal and/or longitudinal track time code signal obtained from a VTR (video tape recorder~ or slave VTR by which a new recording is carried out so as to make the V~TC of a newly recorded siynal continuous to the time code of a previously recorded signal.
More specifically, in accordance with the invention, there is provided an editing system comprising: means for inserting a first address signal in the frames of a vertical blanking period of a v~deo signal recorded on a video track of a tape; means for generating a second address signal recorded on a lonyitudinal track o~ said tape; a ~irst reading circuit for reading sa~d first address signal reproduced from said video track; a second reading circuit for reading said second address signal reproduced from said longitudinal track; means for selecting one address from either of said first address signal inserting means or said second address signal generating means in response to one of the outputs from said first and second reading circuits; further comprising first means fox supplying an output from said first reading circuit to said first address signal inserting means, further comprising second means for supplying an output from said second reading circuit to said second address signal generating means, wherein said first and second supply means for selecting include first and second switches, and further comprising means for controlling said second address signal generating .
,~ .
6~
means ~y said first address signal inserting means.
The other o~jects, features and advantages of the invention will become apparent ~rom the following description taken in con~unction with the accompanying drawings.
BR~EF DES RTPT~ON OF THE DRAWINGS
Fig. 1 is a top plan view of a part o~ a magnetic tape on which a video signal is recorded as slant tracks and an address signal is also recorded by a prior art method;
Fig. 2 is a schematic diagram illustrating the SMPTE
time code signal recorded on t~e tape;
Fig. 3 is a top plan ~iew of a part of a magnetic tape on which a video signal and address signal are recorded by the method of the invention;
Fig. 4 is a diagram showing a recorded pattern of signals on a tape which is recorded ~y the invention;
Fig. 5 is a diagram showing a part o a magnetic tape used for the explanat~on o~ tape edition;
Fig. 6 ~s a diagram showing a part of a magnetic tape used for the explanation of tape edition;
~ ~a ~
~6965 Fig.7 is a block c1iagram showing an example of editing systems aecording to the invention; ancl Figs,8A to 8D are wavef'orm diagrams used for explaining the operation of the system shown in- Fig.7, DESC~IPI'ION, OF TIIE PREFERRED EMBODIMEN'rS
Before deseribing the present invention, a prior art methocl oï recording an address signal on a magnetie tape will be now deseribecl with referenee to Fig.1 whieh shows a part of a magnetic tape on whieh an address signal is reeorded in addition to a video signal.
In Fig.1 ~ TV represents slant video t:raeks formed on a magnetic tape T each of which ineludes a video signal of one field, and TA ~ TQ and TC designate tracks on tape T which include an audio, cue and eontrol signals, respectively. On eue track TQ there is recorded an address signal. In this case, an SMPTE time code signal is used as the address signal and two video tracks TV which form one frame are identified by one SMPTE
time code signal.
The SMPTE time code is approved as the Ameriean National Standard time and control code for video and audio tape for 525 line / 60 field television systems on April 2, 1975 and published on the J'ournal of the SMPTE, Volume 84, July 1975, As shown in Fig.2 which schematically illustrates the SMPTE code signal, each address eorresponding to one frame eonsists of 80 bits numbered 0 through 79 and the bit frequeney is seleeted as 2.4 KHz . In the ease of Fig.2, time address bits eonsisting of 26 bits show 29 frames, 59 seeonds, 59 minutes, and 23 hours. The bit number 10 is the drop frame falg ~ the bit numbers 11, 27, 43, 58 and 59 are unassigned address bits, and the bit numbers 4 to 7, 12 to 15, 20 to 23, 28 to 31, 36 to 39, 44 to 47, 52 to 55 and 60 to 63 are user bitsf respectively.
The synchronizing word of 16 bits is so arranged that it is discriminated whether the tape is transported in the forward direction and hence the SMPTE time code signal is read out in the direction indicated by an arrow F or the tape is transported in the backward direction and hence the SMPTE time code signal is read out in the direction indicated by an arrow R. Accord~
ingly, the time code signal can be read out correctly even if the tape is transported in any direction. In this case, the code signal is so recorded that the information "1" and "0"
thereof are recorded as a so-called bi-phase mark, as shown in Fig. 2.
As described above, if the address signal for each frame of the video signal is recorded on the track TQ which ex-tend in the lengthwise direction of tape T, the tape edition can be carried out very rapidly and precisely.
However, in the case of a slow or still motion repro-duction mode, the speed of the tape becomes very slow or the tape is stopped so that the code signal recorded on the track TQ can not be read out.
Hereinafter, with reference to Figs. 3 and 4 an example of the invention proposed in the aforesaid by copending applica-tion will be described by which an address signal can be read out even in a slow or still reproduction mode and hence the edition of a tape can be carried out efficiently and in which the video signal of the NTSC system is shown as an example.
In Fig. 3 which is a top plan view of a part of a mag-netic tape T on which the video signal and address signals are recorded by the method of the invention.
.,~
With the invention~ an address signal SA identifying a video signal corresponding to eaclI traclc TV is inserted in the video signal as a digital signal antl the video signals, each including the address signal SA, are recorded on thetape 1 as slant traclcs Tv. The address signals SA recorded on the video traclcs TV are marked with single hatches in Eilig.3. In this case, the address signals SA are inserted into the video signals Or odd and even fields of one frame and then recorded as shown in Fig.3.
As shown with single hatches in Fig.4 which shows a record pattern of signals on the tape (not shown) by the invention, one address signal is inserted into one horizontal line period in the suppressed line period within the vertical blanking period or ver-tical interval except a vertical synchronizing pulse period Tvp and equalizing pulse period TEp . In this case, the address - signal is inserted in the period after burst signals Sg and it is desired that the same address signals are inserted repeatedly into three successive horizontal line periods. Hereinafter, this address signal will be referred to simply as a VITC (vertical interval time code) signal. The above suppressed periods mean 10th to 21 st line periods in the NTSC system.
The code oï the VITC signal consists of, for example, 80 bits similar to the SMPTE time code signal shown in Fig.2 andits bit frequency fB is selected as the color subcarrier frequency fSC
( _ 3. 58 MHz ) divided by an integer, for example, one half (1/2) of frequency fsc If the horizontal line frequencv is taken as fH
and the vertical frequency as fV ~ respectively, the following rela-tion (1 ) is established:
fsc 2 H 4 fv ....................... (1 ) ' ' ',, ' ' ' . .
9~
Thus, if the following relation (2) is established:
fB = 2 fSC ,,.,,, (2) the following equation (3) is presented:
B ~ fH ,...,, (3) Thus. 80 bits of the VITC signal can be inserted into one horizontal line period, In 80 bits, 32 bits are adclress bits, other 32 bits are user bits and remaining 16 bits are sync (synchronizing) words, respectively, The arranging relation between-the address bits and user bits could be same as that of the SMPTE time code signal shown in Fig.2, and the adclress bits inserted in ocld and even fields of the same frame are selected same in code, The sync words are located at the head of the VITC signal or immediately after the burst signal SB . As set forth above. the sync words having the same code as that of the SMPTE time code signal shown in Fig.2 could be sufficient, but they are recorded on the video track and hence the reading direction of the code signa] is constant irrespec-tive of the tape transporting direction, Therefore~ they could have entirely different type of the code, By way of egample, they could be changed to the start codes of the VITC signal and the field identi-fication code to identify the odd field ancl the even field, Further, the field identification can be achieved by making the bit number 11 to be "0" or "1 ", Though the SMPTE time code signal and VITC signal are recorded on different tracks . their contents or addresses must be same with each other, In the art there has been known as an edit mode such a case that, as shown in Fig.5 which shows a part of a magnetic tape T having recorded thereon video signals as slant tracks TV ~ parts of recorded tracks TV shown by dotted lines in : .
6~
Fig.5 are erased and then other video signals are recorded on the erased part of tape T, namely, an insert editing is carried out, or such a case that, as shown in Fig.6 which shows a part o~` a magnetic tape r on which video signals are already recorded as slant tracks TV ~ there are newly recorded other video signals following the previous recorded tracks as shown by dotted lines in Fig.6, namely, an assembly editing is carried out. In E'igs 5 and 6, traclss TA ~ TQ and TC are omitted for the salse oî brevity In such a case that video signals, which are inserted and then recorded on a tape or recorded additionally on the tape, are inserted with the VITC signal SA, if the video signals are recorded on the tape as they are, the VITC signals or addresses in recorded tracks TV of video signals have no continuity and hence do not correspond to the SMPTE time code signals and/or VITC signal of the video sig-nals recorded already. Accordingly, in such a case it is necessary -- that the VITC signal SA in the video signal, which is to be inserted or added and then recorded, is removed and thereafter a signal, which has the continuity to the VITC signal SA of the track TV recorded already and corresponds to the SMPTE time code recorded on track TQ, is inserted and then recorded.
The present invention is to provide an editing system which can carry out an editing including the address signal.
An example of editing systems according to the invention will be now described with reference to Fig.7.
In Fig.7, 1 designates a VTR ( video tape recorder ) .
This VTR 1 records a video signal supplied thereto through an input terminal 2V on a tape ( not shown ) as a slant track TV and records the SMPTE time code signal applied thereto through an input terminal 2S on the tape as the track TQ extending in the longitudinal direction oï the tape in recording mode, while reproduces the video signal from s the track TV~ then delivers the same to an output terminal 3V
and reproduces the SMPTE time code signal from track TQ, then delivers the same to an output terminal 3S in reproducing mode.
In Fig. 7, 4 designates a VITC signal inserting cir-cuit which produces the above VITC signal SA and then inserts the same into the video signal, and 5 an SMPTE time code signal generator. The VITC signal inserting circuit 4 can use various circuits shown in, for example, my above-mentioned copending application.
The editing system shown in Fig. 7 has further provid-ed with a VITC reader 6 for reading the VITC signal SA from the video signal, into which the VITC signal SA is inserted, and an SMPTE code reader 7 for reading the SMPTE time code signal.
A video signal which is to be newly inserted and then recorded, is applied to VITC signal inserting circuit 4 through an input terminal 8, and its synchronizing signal is applied to SMPTE time code generator 5 through an input terminal 9, respec-tively. The synchronizing signal applied to input terminal 9 is fed to SMPTE time code signal generator 5, which thèn produces a frame pulse from the synchronizing signal and SMPTE time code signal. However, if the SMPTE time code signal is recorded in the track TQ on the tape of VTR 1, this SMPTE time code signal is reproduced, then supplied through a switch 16 to SMPTE code reader 7 and read out thereby. The output signal from SMPTE code reader 7 is fed through a switch 14 to SMPTE time code signal generator 5 as a preset signal so as to make the SMPTE time code signal therefrom correspond to the SMPTE time code signal recorded on the tape. The SMPTE time code signa:L thus obtained rom SMPTE
time code signal generator 5 is fed through a switch 12 to VITC
signal inserting circuit 4. When there is the VITC signal in a video signal to be newly inserted and recorded, this VITC signal is removed, and in place thereof such a , ~69~iS
VITC signal SA whic}l is provided by time charg~ng the SMPTE
time code signal from SMPTE time code generator 5 is inserted into the vicleo signal, The video signal into which the new VITC signal SA is inserted is supplied from VITC signal insert-ing circuit ~ through input terminal 2V to VTR 1 which inserts or additionally records the video signal on the tape such as shown in Fig,5 or 6.
In the exarnple of the invention shown in Fig,7, SMPTE time code signal generator 5 produces a synchronizing word pulse in the interval of a synchronizing word after a frame as shown in Fig.8A and forms a time code at the initial position of the synchronizing word pulse as shown in Fig,8A. Since it requires the time of one frame to read out the SMPI`E time code, SMPTE code reader 7 carries out its reading delayed by one frame as shown in Fig,8C, Accordingly, SMPTE time code signal generator 5 is preset so as to add one address to the read out out-put, By such signal processing, the VITC signals SA
become continuous through tracks TV which are already formed on the tape and tracks TV which are newly formed on the tape, The video signal delivered to output terminal 3V from VTR -I is l'ed through a switch 15 to VITC reader 6 which then reads out the VITC signal in the video signal which is already recorded, and a signal which is provided by adding one address to the read out VITC signal is fed to VITC signal inserting circuit 4 as its preset signal, Thus, it becomes possible that the VITC
signal in the video signal which will be newly recorded has con-tinuity to the VITC signal in the video signal which is already recorded, This latter method is preferred for use with such a VTR which can not record the SMPTE time code signal, .. : : - . , .
~6~
In Fig,7, l0 clesignates an input termina1 for an external VITC signal and 11 designates an input terminal ror an external SMPTE time code signal. It is possible that the e c-ternal VITC signal o:r SMPTE time code signal led to input terminal 10 or 11 is fed through switch l 5 or 16 to VITC reader - 6 or SMPTE t;me code,reader 7 to produce the preset signal for VITC signal inserting circuit 4 or SMPTE signal generator 5.
Thus, the function of VTR can be improved even though this has no direct relation to editing.
In the system of the invention shown in E~'ig.7, the signal transmission between VITC reader 6 and SMPTE -time code reader 7 can be carried out to preset. each other. Therefore.
it is possible that even when only one of traclcs TQ and TV includes the code signal (SMPTE time code signal or VITC signal) . both readers 6 and 7 can produce the preset signals. In this case, it - may be possible that a circuit is provided for comparing the outputsignals from both readers 6 and 7 to detec-t whether there is an error read out of the address signal caused by dropouts or not and to change the output from an error reader to that fram a correct reader.
~hen a switch 13 is made ON, the signal from VITC
signal inserting circuit 4 is supplied to SMPTE time code signal generator 5. Thus, it is possible that the SMPTE time code signal is produced from the VITC signal which is to be inserted into the video signal and recorded on track TQ .
As described above. since with the present invention the VITC signal in the video signal to be recorded is removed and the VITC signal in the video signal which is already recorded or VITC signal preset by the VITC signal from the track extended in the longitudinal direction of the tape is inserted into the video signal :: , , :
which is newly recorcled, upon editing the acldresses in the video tracks can be made continuous.
Further, with the editing system of the invention, when the signal is transmitted to a remote place, it is of no need to transmit the SMPTE time code signal through a line separate - from that og the videc~ signal and both the code signals can be recorded in the record tracks.
In the system Or the invention shown in Fig.7, when the video signal rrom a VTR, in which no SMPTE tirne code signal is recorded but only the VITC signal is recorcled, is dubbed on VTR 1, it is better that the VITC signal grom VITC signal insert~
ing circuit '~ is supplied through switch 13 to SMPTE time code generator 5 to preset the SMPTE time code thereog to that carre-sponding to the VITC. Thus, -the SMPTE time code can be also recorded on VTR 1 .
- The above description is given on a single pregerred embodiment of the present invention, but it will be apparent that many modigications and variations could be efgected by one skilled in the art without departing grom the spirits or scope of the novel concepts of the invention. Thererore, the scope og the invention should be determined by the appended claims only.
I ~
Claims (3)
1. An editing system comprising:
(a) means for inserting a first address signal in the frames of a vertical blanking period of a video signal recorded on a video track of a tape;
(b) means for generating a second address signal recorded on a longitudinal track of said tape;
(c) a first reading circuit for reading said first address signal reproduced from said video track;
(d) a second reading circuit for reading said second address signal reproduced from said longitudinal track;
(e) means for selecting one address from either of said first address signal inserting means or said second address signal generating means in response to one of -the outputs from said first and second reading circuits;
(f) further comprising first means for supplying an output from said first reading circuit to said first address signal inserting means, further comprising second means for supplying an output from said second reading circuit to said second address signal generating means, wherein said first and second supply means for selecting include first and second switches, and further comprising means for controlling said second address signal generating means by said first address signal inserting means.
(a) means for inserting a first address signal in the frames of a vertical blanking period of a video signal recorded on a video track of a tape;
(b) means for generating a second address signal recorded on a longitudinal track of said tape;
(c) a first reading circuit for reading said first address signal reproduced from said video track;
(d) a second reading circuit for reading said second address signal reproduced from said longitudinal track;
(e) means for selecting one address from either of said first address signal inserting means or said second address signal generating means in response to one of -the outputs from said first and second reading circuits;
(f) further comprising first means for supplying an output from said first reading circuit to said first address signal inserting means, further comprising second means for supplying an output from said second reading circuit to said second address signal generating means, wherein said first and second supply means for selecting include first and second switches, and further comprising means for controlling said second address signal generating means by said first address signal inserting means.
2. An editing system according to claim 1 further comprising means for controlling said first address signal inserting means by said second address signal generating means.
3. An editing system according to claim 1 further comprising means for controlling said first and second reading circuits with each other.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP91552/76 | 1976-07-31 | ||
| JP51091552A JPS5949754B2 (en) | 1976-07-31 | 1976-07-31 | tape editing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1096965A true CA1096965A (en) | 1981-03-03 |
Family
ID=14029652
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA283,773A Expired CA1096965A (en) | 1976-07-31 | 1977-07-29 | Editing system |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US4167759A (en) |
| JP (1) | JPS5949754B2 (en) |
| CA (1) | CA1096965A (en) |
| DE (1) | DE2734337A1 (en) |
| FR (1) | FR2361029A1 (en) |
| NL (1) | NL7708496A (en) |
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| US4287539A (en) * | 1977-03-24 | 1981-09-01 | Spin Physics, Inc. | Segmented video recording with segment identification codes |
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| JPS6016027B2 (en) * | 1977-11-18 | 1985-04-23 | ソニー株式会社 | time code reader |
| JPS6016028B2 (en) * | 1977-11-18 | 1985-04-23 | ソニー株式会社 | time code reader |
| JPS6049981B2 (en) * | 1978-03-31 | 1985-11-06 | ソニー株式会社 | Recording medium running direction detection device |
| JPS54133820A (en) * | 1978-04-08 | 1979-10-17 | Sony Corp | Recording regenerator for video signal |
| JPS6057143B2 (en) * | 1978-08-07 | 1985-12-13 | 株式会社日立製作所 | PCM recording device |
| DE2948369C2 (en) * | 1978-11-30 | 1984-09-27 | Toppan Printing Co. Ltd., Tokio/Tokyo | Electronic device for processing a color television image and method for determining individual images in this device |
| US4354207A (en) * | 1979-03-12 | 1982-10-12 | Chesley Gilman D | System for identifying and locating recorded analog information |
| FR2456425A1 (en) * | 1979-05-10 | 1980-12-05 | Thomson Brandt | METHOD FOR ENCODING BINARY SIGNALS FOR NUMBERING IMAGES STORED ON A RECORDING MEDIUM AND DEVICE FOR READING SIGNALS THUS CODED |
| US4330879A (en) * | 1979-10-18 | 1982-05-18 | Rca Corporation | Adaptive stylus kicker using disc track and disc sector information |
| US4412319A (en) * | 1979-10-18 | 1983-10-25 | Rca Corporation | Video disc player with self calibrating stylus translator |
| JPS5677912A (en) * | 1979-11-28 | 1981-06-26 | Sony Corp | Digital recorder for video signal |
| US4340916A (en) * | 1980-04-11 | 1982-07-20 | Sony Corporation | Apparatus and method for detecting discontinuities in time code addresses |
| US4360843A (en) * | 1980-04-11 | 1982-11-23 | Sony Corporation | Apparatus and method for determining time code addresses at low tape speed |
| JPS5736475A (en) * | 1980-08-08 | 1982-02-27 | Sony Corp | Recording method of pcm signal |
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| JPS57123578A (en) * | 1981-01-22 | 1982-08-02 | Sony Corp | Error correcting circuit for drive data |
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| JPS5864686A (en) * | 1981-10-14 | 1983-04-18 | Sony Corp | Searching method for data on tape |
| US4429385A (en) | 1981-12-31 | 1984-01-31 | American Newspaper Publishers Association | Method and apparatus for digital serial scanning with hierarchical and relational access |
| US4755884A (en) * | 1982-01-12 | 1988-07-05 | Discovision Associates | Audio evaluation of information stored on a record medium under control of video picture frame number |
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| JPH0656708B2 (en) * | 1982-03-02 | 1994-07-27 | ソニー株式会社 | Time code reader |
| JPS59188815A (en) * | 1983-04-08 | 1984-10-26 | Matsushita Electric Ind Co Ltd | Information recording and reproducing device |
| JPS59198551A (en) * | 1983-04-27 | 1984-11-10 | Pioneer Electronic Corp | Tape recorder |
| US4608603A (en) * | 1983-07-18 | 1986-08-26 | Harris Corporation | Microprocessor driven video generator |
| JPS60150281A (en) * | 1984-01-17 | 1985-08-07 | Trio Kenwood Corp | Method for recording address data on tape recorder |
| JPS60261078A (en) * | 1984-06-07 | 1985-12-24 | Victor Co Of Japan Ltd | Recording system of signal to information recording medium disc possible for repetitive recording |
| US4734792A (en) * | 1984-07-24 | 1988-03-29 | Ricoh Company, Ltd. | Record address data recording apparatus for use with a VTR or the like |
| JPH0356937Y2 (en) * | 1984-10-20 | 1991-12-24 | ||
| JPS6176561U (en) * | 1984-10-20 | 1986-05-23 | ||
| JPS61118192U (en) * | 1984-12-29 | 1986-07-25 | ||
| WO1987000381A2 (en) * | 1985-07-05 | 1987-01-15 | Deutsche Thomson-Brandt Gmbh | Method and device for the electronic processing of stored video signals |
| GB2187028B (en) * | 1986-02-24 | 1989-11-08 | Sony Corp | Methods of and apparatus for processing timecode data in a recorded digital video signal |
| DE3615468A1 (en) * | 1986-05-07 | 1987-11-12 | Bosch Gmbh Robert | TIME CODE READING DEVICE IN A MAGNETIC TAPE DEVICE FOR STORING VIDEO SIGNALS |
| DE3619359A1 (en) * | 1986-06-09 | 1987-12-10 | Gen Service Electronics Gmbh | METHOD FOR TRANSMITTING AN INFORMATION CODE ON THE SYNCHRONOUS TRACK OF A VIDEO TAPE, DEVICE FOR CARRYING OUT THE METHOD AND VIDEO TAPE PRODUCED BY THE METHOD |
| US5016119A (en) * | 1987-02-27 | 1991-05-14 | Sony Corporation | Video signal reproducing apparatus with two modes of keeping track of address |
| US4837638A (en) * | 1987-08-06 | 1989-06-06 | Fullwood John W | Video tape editing system with vertical interval time code |
| JP2664944B2 (en) * | 1988-08-12 | 1997-10-22 | 株式会社日立製作所 | Video signal processing circuit |
| US5319453A (en) * | 1989-06-22 | 1994-06-07 | Airtrax | Method and apparatus for video signal encoding, decoding and monitoring |
| JPH04307884A (en) * | 1991-04-04 | 1992-10-30 | Sony Corp | Recording and reproducing system for video signal |
| JPH05166349A (en) * | 1991-12-13 | 1993-07-02 | Victor Co Of Japan Ltd | Magnetic recording and reproducing device |
| US5408368A (en) * | 1992-02-28 | 1995-04-18 | Ampex Corporation | Digital servo track format |
| US5276559A (en) * | 1992-03-27 | 1994-01-04 | Datatape Incorporated | Technique for recording and reproducing low rate data in a helical vehicle scan recorder having a stationary time code signal reproduce magnetic head |
| TW221507B (en) * | 1992-06-16 | 1994-03-01 | Matsushita Electric Ind Co Ltd | |
| DE4230998C1 (en) * | 1992-09-16 | 1994-03-31 | Alpermann & Velte Gmbh | Video cutting and editing process - using remote control unit coupled to pair of recorders with adaptor unit for generating code to identify specific tape positions |
| KR0161807B1 (en) * | 1995-12-30 | 1998-12-15 | 김광호 | Time code generator circuit |
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| EP1186166A1 (en) * | 2000-04-05 | 2002-03-13 | Sony United Kingdom Limited | Video processing and/or recording |
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| ITMI20012548A1 (en) | 2001-12-04 | 2003-06-04 | Ilpea Ind Spa | GASKET FOR REFRIGERATOR FURNITURE AND SIMILAR SUITABLE FOR COMPENSATING MANUFACTURING TOLERANCES |
| JP4229127B2 (en) * | 2006-02-14 | 2009-02-25 | ソニー株式会社 | Video processing apparatus and time code adding method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3493674A (en) * | 1965-05-28 | 1970-02-03 | Rca Corp | Television message system for transmitting auxiliary information during the vertical blanking interval of each television field |
| US3576391A (en) * | 1968-06-26 | 1971-04-27 | Rca Corp | Television system for transmitting auxiliary information during the vertical blanking interval |
| US3666897A (en) * | 1969-12-17 | 1972-05-30 | Ibm | Recording and reproducing system with video heads reading both information data from oblique tracks and address data from the longitudinal control track |
| JPS556277B1 (en) * | 1970-06-23 | 1980-02-14 | ||
| US3761611A (en) * | 1970-06-23 | 1973-09-25 | Hitachi Ltd And Hitachi Electr | Video file system |
| GB1387286A (en) * | 1972-03-27 | 1975-03-12 | Cbs Inc | Method and apparatus for automatically editing television information |
| NL7212015A (en) * | 1972-09-04 | 1974-03-06 | ||
| US3890638A (en) * | 1973-08-22 | 1975-06-17 | Cmx Systems | Color phase matching system for magnetic video tape recordings |
-
1976
- 1976-07-31 JP JP51091552A patent/JPS5949754B2/en not_active Expired
-
1977
- 1977-07-26 US US05/819,173 patent/US4167759A/en not_active Expired - Lifetime
- 1977-07-29 CA CA283,773A patent/CA1096965A/en not_active Expired
- 1977-07-29 DE DE19772734337 patent/DE2734337A1/en active Granted
- 1977-07-29 FR FR7723554A patent/FR2361029A1/en active Granted
- 1977-08-01 NL NL7708496A patent/NL7708496A/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| FR2361029B1 (en) | 1980-05-16 |
| US4167759A (en) | 1979-09-11 |
| FR2361029A1 (en) | 1978-03-03 |
| NL7708496A (en) | 1978-02-02 |
| JPS5317217A (en) | 1978-02-17 |
| DE2734337A1 (en) | 1978-02-16 |
| DE2734337C2 (en) | 1987-12-10 |
| JPS5949754B2 (en) | 1984-12-04 |
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